How to calculate Sales Growth rates ?

Maybe my brain is fried from other workbook problems but the chocies provided by the workbook don’t “jive” with the answers I am coming up with. With that said, what is the method to calculate :

ACME motors sold 150,000 cars in 1984. In 1986 it sold 800,000 cars. In 1989 it sold 5,000,000 cars

What is the sales growth rates (%) for

a. 1984 to 1986

b. 1986 to 1989

c. 1984 to 1989

I have a BA II Plus, if that helps

Thanks !

Sales growth rate = ΔSales / Sales0 = (Sales1 – Sales0) / Sales0

Sales growth rate = (800,000 – 150,000) / 150,000

= 650,000 / 150,000 = 433%

I’ll leave the other two to you.

Thank you S2000 !

You’re welcome.

Surely it is asking for an annual growth rate not a simple growth percentage?